What fraction added to 3/8 gives you the sum of 1

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table

There are three grizzly bears in the city zoo. yogi weighs 400.5 pounds, winnie weighs 560.35 pounds, and nyla weighs 628.29 pounds. what is the average weight of the three bears? (hint: what do they weigh all together? ) a. 502.97 pounds c. 604.38 pounds b. 529.71 pounds d. 794.57 pounds

Ratio of circumference to diameter example plz i need to now what it looks like.